2023 Niner SIR 9

Made from metal

There's a new bike in town. It's built to last and not let you down. When you're spinning up the steeps, bombing down the backcountry and grinding out the final miles as the sun sinks into the horizon, you need a bike you can trust. A comfortable, capable, hand built bike made from proven, air hardened, heat treated steel. That's right, steel. Because Steel Is Real and it's fully optimized in the SIR 9.

Yes, SIR

So what's the story with our steel hardtail? For starters, it's STEEL. This classic metal alloy from materials icon Reynolds gives us the comfortable, durable, capable, versatile, "ride it hard and put it away wet" frame that we have always wanted.

To make it even more tasty, the SIR 9 is strapped with a 120mm travel FOX suspension fork, perforated with no fewer than 18 threaded, reinforced mounting points, clears 29x2.4" (or 27.5x3.0") tires, and offers easy options for geared or singlespeed drivetrains. No excuses pack an extra jacket and a PBR, go farther, and stay out longer.

The SIR 9 is perfect for just about any type of riding, no matter how long or short. It's a butt kicking, grin inducing lunch ride launch pad when you only have 30 minutes to burn in the back lot. It's also made for multi day missions in the backcountry. And it's made to make you happy the minute you throw a leg over it.

Get real with Reynolds 853 steel

This modern metal alloy is well known for its unique properties. It actually strengthens in the tube junctions when it air cools after welding. So, we can do more with it, yet we actually can use less material. For instance, we can design intricate chainstay and seat stay yokes to accommodate either 29" or 27.5 Plus wheels and tires, with plenty of mud clearance to spare. We also don't need to add heavy gussets and tube reinforcements it's plenty strong as is.

"Trail country" geometry

Blurring the lines between modern trail bike geometry and traditional cross country geometry, the SIR 9 occupies a niche we lovingly call "trail country." If you're doing a combination of long pedaling rides, stiff climbs, extended descents, and spicy technical sections, you'll love what we've done here. "Trail country" geometry translates to modern trail manners when you need them most, with no sacrifice of efficiency or agility.

The roomy cockpit has a comfortable reach for short stem lengths, giving you quick handling and plenty of maneuverability to blast through rock gardens and cut hard corners. The steep 74 degree seat angle gets you centered over the BB for climbing and pairs nicely with the short 430mm chainstay length for supreme pedaling efficiency.. And of course, the slack, 68 degree head tube angle and long wheelbase contribute stability and self confidence when you're dropping into the steepest lines.

Pack it up, pack it in, let me begin

The versatility of steel gives us the option to add accessory mounting points, and boy did we ever. There are rack and fender mounts, bottle cage mounts, frame bag mounts, and even a top-tube bento box mount. The rear rack mounts are strong enough to hold 55lbs.

Features

• Reynolds 853 steel

  The magic air-hardened metal from Reynolds actually strengthens after welding.

  

• Multiple mounting options

  No fewer than 18 mounting points give you the freedom to run racks, fenders, bottles, frame bags, a bento box, and more.

  

• Biocentric 30

  Do you yearn for simplicity? Our patented BioCentric bottom bracket system gives you the freedom to easily go single-speed or geared.

  

• Trail ready geometry

  With a longer top tube and slacker head tube angle, the SIR 9 is stable, trail-specced and ready to get shreddy in all circumstances.

  

• Integrated dropper post routing

  Clean and concealed, SIR 9 is ready with ports on the seat tube for internal dropper post cable routing.

  

• Lifetime warranty

  Ride, race, rally. We have you covered with warranty service, small parts, and a support team that actually answers the phone.

  

• Tire clearance

  Need room to roam? We got it. The SIR 9 has clearance to run your choice of 29er or 27.5+ wheels and tires.

  

Doccuments

Click for 5 STAR SRAM X01 EAGLE Specification

Click for 4-STAR SHIMANO XT Specification

Click for 3-STAR SRAM GX EAGLE Specification

Click for 3-STAR SHIMANO SLX SINGLESPEED Specification

Click for 2-STAR SRAM SX EAGLE Specification

Click for Frame Only Specification

Geometry Size

Click for 2023 SIR 9 Geometry Details